CN110986912B - Signal processing circuit signal interference detection method, storage medium and computer device - Google Patents
Signal processing circuit signal interference detection method, storage medium and computer device Download PDFInfo
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- CN110986912B CN110986912B CN201911284127.XA CN201911284127A CN110986912B CN 110986912 B CN110986912 B CN 110986912B CN 201911284127 A CN201911284127 A CN 201911284127A CN 110986912 B CN110986912 B CN 110986912B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/58—Turn-sensitive devices without moving masses
- G01C19/64—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
- G01C19/72—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
Abstract
The invention belongs to a detection method of a signal processing circuit of a fiber-optic gyroscope, and aims to solve the technical problem that whether interference exists between signals of the signal processing circuit can not be accurately evaluated when a dead zone exists in the working process of the fiber-optic gyroscope in the prior art, the signal interference detection method, the storage medium and the computer equipment of the signal processing circuit are provided, the interference between the signals in the signal processing circuit can be effectively detected under the condition that no additional instrument or circuit is added, a pulse waveform with controllable frequency is generated by an FPGA (field programmable gate array) in a core control unit and is input to a signal modulation and feedback unit, the pulse waveform is processed and then subjected to Fourier transform, and a corresponding time domain signal is converted into a frequency spectrum to be used as a standard signal; and then, inputting the ground signal and the power signal into a signal demodulation unit respectively, processing the ground signal and the power signal, outputting the processed ground signal and the processed power signal, converting the processed ground signal and the processed power signal into frequency spectrums through Fourier transform, comparing the frequency spectrums with standard signals respectively, and judging whether interference exists between the signals, wherein the storage medium and the computer equipment are used for storing and operating the detection method.
Description
Technical Field
The invention belongs to a detection method of a signal processing circuit of a fiber-optic gyroscope, and particularly relates to a signal interference detection method of the signal processing circuit, a computer readable storage medium and computer equipment.
Background
A Fiber Optic Gyroscope (FOG) is an optical Fiber angular velocity sensor based on the Sagnac effect, and a current digital closed-loop interference type optical Fiber Gyroscope is a relatively mature interference type optical Fiber Gyroscope, and consists of a light source, a light path and a signal processing circuit. The light source is mainly used for providing a proper optical signal required for generating the Sagnac effect for the optical fiber gyroscope, and obtaining an interference signal with a high signal-to-noise ratio due to high stable output optical power; the optical path part comprises a coupler, a Y waveguide and an optical fiber ring and is mainly used for obtaining the phase difference of interference signals through the Sagnac effect in a closed optical path; the signal processing circuit is mainly used for conditioning weak signals, realizing a closed-loop algorithm and corresponding modulation of the Y waveguide, and calculating and outputting angular rate.
As shown in fig. 1, the signal processing circuit of the fiber-optic gyroscope mainly comprises a signal demodulation unit 01, a core control unit 02, a signal modulation and feedback unit 03, a serial communication interface 04 and a power circuit 05. When the angular rate is input in the sensitive direction of the gyroscope from the outside, error information related to the angular rate is superposed on the output optical signal of the gyroscope, the optical signal is output and converted into a voltage signal through the PIN-FET, the voltage signal is conditioned through the signal demodulation unit 01, the voltage signal is converted into a digital signal through the analog-to-digital converter in the signal demodulation unit 01 after blocking, cutting a peak, amplifying, adjusting a bias voltage and converting a single end into a difference, and the digital signal is sent to the FPGA in the core control unit 02. On one hand, the FPGA acquires the digital signal, calculates the digital quantity of the input angular rate error signal, digitally modulates the angular rate information, outputs the feedback control quantity to the digital-to-analog converter in the signal modulation and feedback unit 03, and outputs the feedback control quantity to the Y waveguide of the gyroscope after passing through the amplifying and filtering circuit in the signal modulation and feedback unit 03, and adjusts the phase error signal generated by the input angular rate to the original working point to form closed-loop feedback. On the other hand, the FPGA carries out digital demodulation on the input error signal to obtain gyro sensitive angular rate output data, and the gyro data are output through the serial port communication circuit according to the protocol specification.
The fiber-optic gyroscope has been widely used in the field of inertial navigation due to its advantages of impact resistance, high sensitivity, long service life, large dynamic range, short start-up time, etc. With the development of the optical fiber gyroscope towards high precision, light weight and small size, the low-speed sensitivity index of the optical fiber gyroscope becomes poor, so that a dead zone in a certain range exists during the operation of the optical fiber gyroscope. When the fiber-optic gyroscope is used on an inertial navigation product, the existence of the dead zone may cause the errors of navigation precision and alignment precision to become large.
In the existing research, whether the optical fiber gyro has a dead zone is mostly measured by a rate turntable low-speed rotation test method or a flat plate eight-position placement test method, among a plurality of factors causing the dead zone, the interference between signals of an optical fiber gyro signal processing circuit is the most important factor, and if the dead zone exists through the test, but the factors causing the dead zone cannot be accurately and quickly separated, whether the dead zone is caused by the interference between the signals of the optical fiber gyro signal processing circuit cannot be evaluated.
Disclosure of Invention
The invention mainly aims to solve the technical problems that in the prior art, when a dead zone exists in the working process of a fiber-optic gyroscope, the interference between signals of a signal processing circuit cannot be accurately evaluated, and further whether the interference between the signals is a factor causing the dead zone of the fiber-optic gyroscope cannot be eliminated, and provides a method for detecting the signal interference of the signal processing circuit of the fiber-optic gyroscope.
In order to achieve the purpose, the invention provides the following technical scheme:
the signal interference detection method for the signal processing circuit is characterized by comprising the following steps of:
s1, obtaining a standard signal
S1.1, an FPGA in a core control unit generates pulse waves, and the pulse waves are input to a signal modulation and feedback unit;
s1.2, after the pulse wave is processed by a signal modulation and feedback unit, carrying out Fourier transform to obtain a frequency spectrum corresponding to the pulse wave;
s2, ground signal comparison
S2.1, inputting a ground signal of the signal processing circuit into a signal demodulation unit, and controlling a core control unit to acquire the ground signal through an analog-to-digital converter in the signal demodulation unit through an FPGA (field programmable gate array) to obtain a discrete digital signal;
s2.2, carrying out Fourier transform on the discrete digital signal corresponding to the ground signal to obtain a frequency spectrum corresponding to the ground signal;
s2.3, comparing the frequency spectrum corresponding to the pulse wave with the frequency spectrum corresponding to the ground signal, and finding corresponding frequency points in the frequency spectrum corresponding to the pulse wave in the frequency spectrum corresponding to the ground signal; comparing the amplitude corresponding to each frequency point with the amplitude at the frequency point which is greater than 0HZ in the frequency spectrum corresponding to the ground signal one by one, if the magnitude difference exists, the ground signal has interference under the frequency point between the signal modulation and feedback unit and the signal demodulation unit;
s3, comparing power signals
S3.1, inputting a power supply signal of the power supply circuit into a signal demodulation unit, and acquiring the frequency of the power supply signal by a core control unit through an analog-to-digital converter in an FPGA control signal demodulation unit to obtain a discrete digital signal;
s3.2, carrying out Fourier transform on the discrete digital signal corresponding to the power signal to obtain a frequency spectrum corresponding to the power signal;
s3.3, comparing the frequency spectrum corresponding to the pulse wave with the frequency spectrum corresponding to the power supply signal, and finding out corresponding frequency points in the frequency spectrum corresponding to the pulse wave in the frequency spectrum corresponding to the power supply signal; and comparing the amplitude corresponding to each frequency point with the amplitude at the frequency point which is greater than 0HZ in the frequency spectrum corresponding to the power supply signal one by one, wherein if the magnitude difference exists, the power supply signal has interference at the frequency point between the signal modulation and feedback unit and the signal demodulation unit.
Further, in S1.1, the FPGA in the core control unit generates a pulse wave, and a generation frequency of the pulse wave covers at least a fifth harmonic of an eigenfrequency of the fiber optic gyroscope.
Further, in S2.1, the core control unit controls the analog-to-digital converter in the signal demodulation unit to acquire the ground signal through the FPGA, and the frequency of the ground signal acquired by the analog-to-digital converter is the frequency of the closed loop working state of the fiber-optic gyroscope and is less than or equal to 80% of the maximum sampling frequency of the analog-to-digital converter.
Further, in S3.1, the core control unit controls the analog-to-digital converter in the signal demodulation unit to acquire the frequency of the power supply signal through the FPGA, and the frequency of the ground signal acquired by the analog-to-digital converter is the frequency of the closed loop working state of the fiber-optic gyroscope and is less than or equal to 80% of the maximum sampling frequency of the analog-to-digital converter.
Computer-readable storage medium, on which a computer program is stored, which is characterized in that the program realizes the steps of the method as described above when executed by a processor.
Computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the steps of the method as described above are implemented when the processor executes the program.
Compared with the prior art, the invention has the beneficial effects that:
1. the method for detecting the signal interference of the signal processing circuit of the fiber-optic gyroscope can effectively detect the interference among signals in the signal processing circuit based on the original structure of the signal processing circuit under the condition of not adding any additional instrument or circuit, generates a pulse waveform with controllable frequency through an FPGA (field programmable gate array) in a core control unit, inputs the pulse waveform into a signal modulation and feedback unit, performs Fourier transform after processing, and converts a corresponding time domain signal into a frequency spectrum to be used as a standard signal; and then, the ground signal and the power signal are respectively input into the signal demodulation unit, the processed output is converted into frequency spectrum through Fourier transform, so that the frequency characteristics of the signals are clearer, the signals are respectively compared with standard signals to judge whether interference exists between the signal modulation and feedback unit and the signal demodulation unit, the detection method is simple and easy to realize, and whether crosstalk exists in the signals under a series of frequency points corresponding to the pulse waves can be correspondingly detected by adjusting the frequency of the pulse waves.
2. The core control unit controls the acquisition frequency of the analog-to-digital converter to be less than or equal to 80% of the maximum sampling frequency of the analog-to-digital converter, and the analog-to-digital converter can work in the optimal state.
3. The computer-readable storage medium of the present invention stores the above-described detection method, and converts the detection method into a program for detecting signal interference.
4. The processor of the computer device of the present invention can execute the above signal interference detection method, and the computer device can be directly used for detection.
Drawings
FIG. 1 is a schematic diagram of a fiber-optic gyroscope signal processing circuit in the prior art;
in fig. 1, 01-signal demodulation unit, 02-core control unit, 03-signal modulation and feedback unit, 04-serial communication interface and 05-power supply circuit.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention and the accompanying drawings, and it is obvious that the described embodiments do not limit the present invention.
In practical application, a fiber optic gyroscope has a relatively obvious nonlinear error under the condition of a relatively small input angular rate, particularly near a zero input, the output of the gyroscope is always zero, namely the gyroscope is insensitive to the input, namely a dead zone phenomenon exists. When the modulated signal output by the signal modulation and feedback unit is in crosstalk with the signal conditioning circuit, the gyroscope cannot be normally reset, and a dead zone exists in the gyroscope.
The signal processing circuit signal interference detection method is used for evaluating the interference situation between signals, does not need to be externally connected with other devices on the basis of the original signal processing circuit, and comprises the following specific steps in one embodiment of the invention:
s1, obtaining a standard signal
S1.1, an FPGA in a core control unit generates pulse waves, and the pulse waves are input to a signal modulation and feedback unit; the frequency of the pulse wave is adjustable and controllable, and can be adjusted according to the requirement; the generation frequency of the pulse wave covers at least the fifth harmonic of the eigenfrequency of the fiber-optic gyroscope.
S1.2, after the pulse wave is processed by a signal modulation and feedback unit, carrying out Fourier transform to obtain a frequency spectrum corresponding to the pulse wave;
s2, ground signal comparison
S2.1, inputting a ground signal of the signal processing circuit into a signal demodulation unit, and controlling a core control unit to acquire the ground signal through an analog-to-digital converter in the signal demodulation unit through an FPGA (field programmable gate array) to obtain a discrete digital signal; the core control unit can control the acquisition frequency of the analog-to-digital converter through the FPGA, and the frequency of the ground signal acquired by the analog-to-digital converter is the frequency of the closed loop working state of the fiber-optic gyroscope and is less than or equal to 80% of the maximum sampling frequency of the analog-to-digital converter;
s2.2, carrying out Fourier transform on the discrete digital signal corresponding to the ground signal to obtain a frequency spectrum corresponding to the ground signal;
s2.3, comparing the frequency spectrum corresponding to the pulse wave with the frequency spectrum corresponding to the ground signal, and finding corresponding frequency points in the frequency spectrum corresponding to the pulse wave in the frequency spectrum corresponding to the ground signal; comparing the amplitude corresponding to each frequency point with the amplitude at the frequency point which is greater than 0HZ in the frequency spectrum corresponding to the ground signal one by one, if the magnitude difference exists, the ground signal has interference under the frequency point between the signal modulation and feedback unit and the signal demodulation unit;
s3, comparing power signals
S3.1, inputting a power supply signal of the power supply circuit into a signal demodulation unit, and acquiring the frequency of the power supply signal by a core control unit through an analog-to-digital converter in an FPGA control signal demodulation unit to obtain a discrete digital signal; the core control unit can control the acquisition frequency of the analog-to-digital converter through the FPGA, and the frequency of the ground signal acquired by the analog-to-digital converter is the frequency of the closed loop working state of the fiber-optic gyroscope and is less than or equal to 80% of the maximum sampling frequency of the analog-to-digital converter;
s3.2, carrying out Fourier transform on the discrete digital signal corresponding to the power signal to obtain a frequency spectrum corresponding to the power signal;
s3.3, comparing the frequency spectrum corresponding to the pulse wave with the frequency spectrum corresponding to the power supply signal, and finding out corresponding frequency points in the frequency spectrum corresponding to the pulse wave in the frequency spectrum corresponding to the power supply signal; and comparing the amplitude corresponding to each frequency point with the amplitude at the frequency point which is greater than 0HZ in the frequency spectrum corresponding to the power supply signal one by one, wherein if the magnitude difference exists, the power supply signal has interference at the frequency point between the signal modulation and feedback unit and the signal demodulation unit.
S2.3 is similar to S3.3 in that a series of frequency points to be compared are found in the ground signal spectrum or the power signal spectrum, and the frequency points are frequency points corresponding to the pulse wave, then amplitudes corresponding to the frequency points are compared with amplitudes at frequency points other than 0Hz in the ground signal spectrum or the power signal spectrum one by one, and if there is signal crosstalk, the amplitude at the frequency point is compared with amplitudes at other frequency points, and there is an obvious magnitude difference.
The detection method is to detect whether there is signal interference from the signal modulation and feedback unit to the signal demodulation unit, if the signal component of the signal modulation and feedback unit is detected in the signal of the signal demodulation unit, the interference can be considered to exist, the signal is processed with Fourier transform, the frequency characteristic of the signal can be clearer, and the judgment is easier. In addition, it may also be determined whether the signal interference is caused by a ground signal, a power signal, or both. In actual detection, only the ground signal or only the power signal may be detected as required. The invention simultaneously detects the interference condition of the ground signal and the power signal, and only the ground signal or the power signal can be detected according to the requirement in practical application, or the ground signal and the power signal can be simultaneously detected as described in the embodiment of the invention.
The detection method can be used for a signal processing circuit of the fiber-optic gyroscope, and can also apply the detection idea and principle to the interference detection of other signal processing circuits.
In addition, the above-described detection method may also be used in storage media and computers, such as computer-readable storage media, on which computer programs are stored, which when executed by a processor implement the steps of the above-described method; or a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the steps of the above method being performed when the processor executes the program.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the present invention.
Claims (4)
1. A method for detecting signal interference in a signal processing circuit, comprising the steps of:
s1, obtaining a standard signal
S1.1, an FPGA in a core control unit generates pulse waves, and the pulse waves are input to a signal modulation and feedback unit;
s1.2, after the pulse wave is processed by a signal modulation and feedback unit, carrying out Fourier transform to obtain a frequency spectrum corresponding to the pulse wave;
s2, ground signal comparison
S2.1, inputting a ground signal of the signal processing circuit into a signal demodulation unit, and controlling a core control unit to acquire the ground signal through an analog-to-digital converter in the signal demodulation unit by using the FPGA to obtain a discrete digital signal, wherein the frequency of the ground signal acquired by the analog-to-digital converter is the frequency of the closed loop working state of the fiber-optic gyroscope and is less than or equal to 80% of the maximum sampling frequency of the analog-to-digital converter;
s2.2, carrying out Fourier transform on the discrete digital signal corresponding to the ground signal to obtain a frequency spectrum corresponding to the ground signal;
s2.3, comparing the frequency spectrum corresponding to the pulse wave with the frequency spectrum corresponding to the ground signal, and finding corresponding frequency points in the frequency spectrum corresponding to the pulse wave in the frequency spectrum corresponding to the ground signal; comparing the amplitude corresponding to each frequency point with the amplitude at the frequency point which is greater than 0HZ in the frequency spectrum corresponding to the ground signal one by one, if the magnitude difference exists, the ground signal has interference under the frequency point between the signal modulation and feedback unit and the signal demodulation unit;
s3, comparing power signals
S3.1, inputting a power supply signal of the power supply circuit into a signal demodulation unit, and controlling the frequency of the power supply signal acquired by an analog-to-digital converter in the signal demodulation unit through an FPGA (field programmable gate array) by a core control unit to obtain a discrete digital signal, wherein the frequency of the power supply signal acquired by the analog-to-digital converter is the frequency of the closed loop working state of the fiber-optic gyroscope and is less than or equal to 80% of the maximum sampling frequency of the analog-to-digital converter;
s3.2, carrying out Fourier transform on the discrete digital signal corresponding to the power signal to obtain a frequency spectrum corresponding to the power signal;
s3.3, comparing the frequency spectrum corresponding to the pulse wave with the frequency spectrum corresponding to the power supply signal, and finding out corresponding frequency points in the frequency spectrum corresponding to the pulse wave in the frequency spectrum corresponding to the power supply signal; and comparing the amplitude corresponding to each frequency point with the amplitude at the frequency point which is greater than 0HZ in the frequency spectrum corresponding to the power supply signal one by one, wherein if the magnitude difference exists, the power supply signal has interference at the frequency point between the signal modulation and feedback unit and the signal demodulation unit.
2. The signal processing circuit signal interference detection method of claim 1, wherein: in S1.1, an FPGA in the core control unit generates pulse waves, and the generation frequency of the pulse waves at least covers the fifth harmonic of the eigenfrequency of the fiber-optic gyroscope.
3. A computer-readable storage medium having stored thereon a computer program, characterized in that: which program, when being executed by a processor, carries out the steps of the method as claimed in claim 1 or 2.
4. Computer apparatus comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein: the processor, when executing the program, realizes the steps of the method according to claim 1 or 2.
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| CN116540064B (en) * | 2023-04-07 | 2024-02-02 | 亚之捷智能装备(江苏)有限公司 | Interference monitoring method and system of signal processing circuit based on big data |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101071068A (en) * | 2007-06-20 | 2007-11-14 | 北京航空航天大学 | Co-channel interference measuring method of signal processing device for interference optical fiber gyroscope |
| CN102650526A (en) * | 2012-04-25 | 2012-08-29 | 北京航空航天大学 | Open-loop detecting circuit for frequency modulated continuous wave optical fiber gyroscope based on phase comparison |
| CN103313070A (en) * | 2012-03-16 | 2013-09-18 | 三星电子株式会社 | Broadcast receiving apparatus and method for removing interference signal of analog broadcast signal |
| JP2016134871A (en) * | 2015-01-22 | 2016-07-25 | セイコーエプソン株式会社 | Circuit device, physical quantity detection device, electronic apparatus and moving body |
| CN108398628A (en) * | 2018-03-05 | 2018-08-14 | 中国科学院苏州生物医学工程技术研究所 | A kind of crosstalk measurement analysis method of the high-speed ADC circuit board based on frequency domain character |
-
2019
- 2019-12-13 CN CN201911284127.XA patent/CN110986912B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101071068A (en) * | 2007-06-20 | 2007-11-14 | 北京航空航天大学 | Co-channel interference measuring method of signal processing device for interference optical fiber gyroscope |
| CN103313070A (en) * | 2012-03-16 | 2013-09-18 | 三星电子株式会社 | Broadcast receiving apparatus and method for removing interference signal of analog broadcast signal |
| CN102650526A (en) * | 2012-04-25 | 2012-08-29 | 北京航空航天大学 | Open-loop detecting circuit for frequency modulated continuous wave optical fiber gyroscope based on phase comparison |
| JP2016134871A (en) * | 2015-01-22 | 2016-07-25 | セイコーエプソン株式会社 | Circuit device, physical quantity detection device, electronic apparatus and moving body |
| CN108398628A (en) * | 2018-03-05 | 2018-08-14 | 中国科学院苏州生物医学工程技术研究所 | A kind of crosstalk measurement analysis method of the high-speed ADC circuit board based on frequency domain character |
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